【引自heiyeluren的博客】测试环境 CPU：Intel Pentium4 2.66GHz Memory：1GB Disk：73GB/SCSI OS：FreeBSD 4.11 PHP：PHP 5.2.1 MySQL：MySQL 4.1.23b 前期工作 my.cnf max_heap_table_size = 128M 建表 use test; -- -- Store engine heap -- CREATE TABLE
【引自heiyeluren的博客】测试环境
CPU：Intel Pentium4 2.66GHz
Memory：1GB
Disk：73GB/SCSI
OS：FreeBSD 4.11
PHP：PHP 5.2.1
MySQL：MySQL 4.1.23b
前期工作
my.cnf
max_heap_table_size = 128M 登录后复制 |
建表
<p>use test;</p><p>--<br>-- Store engine heap<br>--<br>CREATE TABLE `tbl_heap` ( <br>`id` int(11) NOT NULL auto_increment, <br>`name` varchar(32) NOT NULL default '', <br>`email` varchar(32) NOT NULL default '', <br>`summary` varchar(255) default '', <br>KEY `id` (`id`) <br>) ENGINE=HEAP DEFAULT CHARSET=gbk; </p><p>--<br>-- Store engine myisam<br>--<br>CREATE TABLE `tbl_isam` ( <br>`id` int(11) NOT NULL auto_increment, <br>`name` varchar(32) NOT NULL default '', <br>`email` varchar(32) NOT NULL default '', <br>`summary` varchar(255) default '', <br>KEY `id` (`id`) <br>) ENGINE=InnoDB DEFAULT CHARSET=gbk;</p> 登录后复制 |
插入数据
说明：每次都是空表插入数据
插入10000 Record
Heap engine insert 10000 record used time: 3.5008587837219<br>MyISAM engine insert 10000 record used time: 4.5881390571594 登录后复制 |
50000 Record
Heap engine insert 50000 record used time: 19.895354986191<br>MyISAM engine insert 50000 record used time: 33.866044998169
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100000 Record
Heap engine insert 100000 record used time: 36.200875997543<br>MyISAM engine insert 100000 record used time: 68.34194111824
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200000 Record
Heap engine insert 200000 record used time: 68.00207901001<br>MyISAM engine insert 200000 record used time: 125.26263713837 登录后复制 |
查询数据
表里分表有：200000条记录，两个表数据一致
直接select，10000次，每次取100条记录
Heap engine select 10000 times, 100 record used time: 12.122506141663<br>MyISAM engine select 10000 times, 100 record used time: 19.512896060944 登录后复制 |
直接select，1000次，每次取10000条记录
Heap engine select 1000 times, 10000 record used time: 111.54126811028<br>MyISAM engine select 1000 record used time: 116.79438710213 登录后复制 |
增加where条件，1000次，每次取10000条记录
Heap engine select 1000 times, 10000 record used time: 111.52102303505<br>MyISAM engine select 1000 times, 10000 record used time: 117.68481087685
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where条件，10000次，每次从1000条起，取1000条记录
Heap engine select 10000 times, 1000 record used time: 124.28988695145<br>MyISAM engine select 10000 times, 1000 record used time: 139.82107305527
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where条件增加like，10000次，每次从1000条起，取1000条记录
Heap engine select 10000 times, 1000 record used time: 145.43780493736<br>MyISAM engine select 10000 times, 1000 record used time: 163.56296992302 登录后复制 |
where条件增加索引，10000次，每次从1000条起，取1000条记录
<p>-- 建立索引 (在SQLyob下执行)<br>ALTER TABLE tbl_heap ADD INDEX idx_name (name);<br>ALTER TABLE tbl_isam ADD INDEX idx_name (name);</p><p>Heap engine alter table add index used time: 2.078<br>MyISAM engine alter table add index used time: 13.516</p><p>Heap engine select 10000 times, 1000 record used time: 153.48922395706<br>MyISAM engine select 10000 times, 1000 record used time: 239.86818814278</p> 登录后复制 |
PS：不合适的索引还不如不要。
